Wire weaving looms



Jan. 24, 1956 H. c. FRENTZEL WIRE WEAVING LOOMS Filed Dec. 6, 1950 13 Sheets-Sheet l ATTOR NEY Jan. 24, 1956 1-1. c. FRENTZEL WIRE WEAVING LOOMS 13 Sheets-Sheet 2 Filed Dec. 6, 1950 miliw---1---:---1111111w 15 1 x uw n, \L Y Nw wwf. @wal 1 Nw 1 1111/1111 1111 1@ wx QN www RN a @n OQ NN QR NQ Q 1 02. 1F|1 it.. ,.1 IIIH 1 .I L On vr mm m mk QN NQ nu MEQ 1 n ww( mx mKIIIII| |1IIII|I||I|I|||1 .IIIIIIIIIIIIII @l 1.1111111 11111111 11 11 .1. 11111 11111 e INI \l\ Wm ww ma D KN .v L .ww

Jan. 24, 1956 H. c. FRENTZEL 2,731,986

WIRE wEAvING LooMs Filed Deo. e, 195o 15 sheets-sheet 3 FIG. 6

A /NVEN TOR r M 274 HERMA/v CFRENTZEL 25.9 ATTO NEY Jan. 24, 1956 H. c. FRENTZEL WIRE WEAVING LOOMS 13 Sheets-Sheet 4 Filed Deo. 6, 1950 N www@ D .f lo@ www1 .11M m mmm .RN (m3 GN M" NWN QQ RN u OWN i www .3 @N I r .A JJ w ANN O G n O S l o @uw www m mwN www QN .@.NKNI @w\@ OO OO E. Y mn MM MM m VE! T WC/M/A M M@ m. H w Q www A1 www NvN O I O I O O I a H. C. FRENTZEL WIRE WEAVING LOOMS Jan. 24, 1956 13 Sheets-Shet 5 Filed Dec. 6, 1950 /NVENTOR HERMAN C FRENTZEL 50W@ ATTORNEY www .wmv QQWQ @N I mm ,Q mwah QN .GHRH To i@ Jan. 24, 1956 H. c. FRENTzEI.

WIRE WEAVING LOOMS 13 Sheets-Sheet 6 Filed Dec. 6, 1950 /N VEN TOR HERMANCHQENTZEL @y di @/TMEY S. N @T @vom Jan. 24, 1956 K H. c. FRENTZEL 2,731,986

WIRE wEAvING LooMs Filed Dec. 6, 1950 13 Sheets-Sheet 7 Z6 FI G. 15 zz/ ZZZ /N VEN TOR HERMAN C HQE ZEL u M ATTORNEY Jan. 24, 1956 H. c. FRENTzI-:L 2,731,985

WIRE WEAVING LOOMS Filed Dec. 6, 1950 13 Sheets-Sheet 8 FIG. 16'

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TTORNEY Jan. 24, 1956 H C, FRENTZEL 2,73L986 WIRE WEAVING LOOMS Filed Dec. 6, 1950 15 Sheets-Sheet 9 F1649 205 if 151735 82186 24 6" *'56 /A/VENTOR HERMA/v C FRE/vrza M Mme ATTORNEY Jan. 24, 1956 H. c. FRENTZEI.

WIRE WEAVING LOOMS 13 Sheets-Sheet l0 Filed Dec. 6. 1950 /N VEN TOR mw mm.

HERMAN C. FRENTZEL NQ ma ATTORNEY Jan. 24, 1956 H. c. FRENTZEL WIRE wEAvING Looms 15 Sheets-Sheet ll EZG. 2.9

Filed Dec. 6, 1950 FIG. 28 ,fsf 192 67 /35 94 /30 67 FIG.. l `93 10a 107 3st 15a /A/ VE N TOR HERMAN C fRENZEL Jan. 24, 1956 H. c. FRENTZEL. 2,731,986

WIRE WEAVING LOOMS Filed Dec. 6, 1950 13 Sheets-Sheet 12 4560 37-142 143 J4 FIG-54 |44 375853,@

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n 5 WEET w/RE L ARRRoA cHEs BEAT L/NE F12-G. .50 cLoTH FACE l SEAN/R W/RE CLA/WPS RELEASE HERMAN C. F ENnEL Qm ATTORNEY United States Patent O WIRE WEAVING LooMs Herman C. Frentzel, Milwaukee, Wis., assignor to Appleton Wire Works, Inc., Appleton, Wis., a corporation of Wisconsin Application December 6, 1950, `Serial No. ,199,482 30 Claims. (Cl. 13,9.-7126') The present invention relates to looms and more particularly to weft-manipulating means f or looms.

An object of the invention is to provide a loom -having improved weft-manipulating means of the pirnless shuttle type, andy further to provide weft-manipulating means of this ltype which can' readily be applied to existing looms.

Another object is to provide a loom having at a shuttle box thereof a .control Wheel or roller cooperable with the shuttle to serve various wfunctions, such as weft stretch-oli, shuttle-positioning after stretch-off, Yshuttlebraking, weft-indicating, and lay control.

Still another object is to provide a loom .including a novel gripper shuttle which :is .propelled through .the shed in Iboth directions `to lay weft -thereinfrom supply means at opposite sides of the loom, and which cooperates lwith other parts of the loom in such manner as `to conserve Weit material. A

A further object .is .to `provide a loom .having an improved picking or shuttleethrowing mechanism which is of simple and reliable construction and capable of rapid operation, the mechanism :being further .adapted to form a unit with a shiftably mounted shuttle box.

A still yfurther object :.is lto provide .a iloom including a novel form ofshuttle .box `vvrhichis readily adjustable to permit weaving lof :fabrics .of diierent widths without Vchanging lthe length of .the .lay .or .the reed.

The invention .further consists in athe several features hereinafter described .and claimed.

.ln kthe accompanying drawings,

Fig. 1 is an elevationshowjnglhe rightfhand side of a wire weavingloom embodying the invention;

Fig. 2 is a .diagrammatic top ...View ,of :lay-operating vmeans of the `loom and showing :schematically .a .laycontrolling circuit;

Fig. -3 is .an elevationalsectionof therighkhand side portion of the loom, taken generallyon .the :line .3-.3

Fig. 4 is .a `fragmentary detail end .View of a .weft Aspool support;

Fig. 5 is a detail .sectional .view taken .generally on the line 5-5 of Fig. .3.;

Fig. 6 is an elevational .section taken .generally on `the .linen-6 .of :Fig 3;

Fig. 7 is a side elevation ...of ,amain assembly, parts of anoscillatng cam memberandactuating,means there for being shown insection;

Fig. v8 is a detailelevational Asection oi a `stationary cam member and. its mounting;

Fig. 9 is a horizontal sectional Ayiew taken generally onthe line 9-9.of.Fig. `6;

Fig. `lOis a .top view,.of .the right-.hand vshuttle box unit, parts 3 being shown in ...section iFig. `11 is an Vouter end ,vieu/,of 'the Aright-hand lay mounted shuttle'box unit;

Fig. 12 is -a;horizontal .,sectionofga portion of the right-hand shuttle .box lagirait, .talen Egenerally on the line Fig. 13 is a transverse sectional View taken generally on the line 13-13 vof Fig. 12';

Fig. 14 is a side view of a multiple sheave for the shuttle-throwing mechanism;

lFig.` 15 is a vtransverse elevational section taken generally on the line 15-15 of Fig. 3, showing the Vlay on 'its forward stroke andthe shuttle boxed .in the righthand shuttle box unit;

Fig. 16 4is a .transverse .elevational section taken generally on the line 16-16 of Fig. l0;

Fig. 17 is a transverse'elevational section taken generally on the line 17`-17 of Fig. 1.0;

Fig. 18 is a .transverse .elevational section taken generally on .the line 18-18 of Fig. 10;

Fig..19 is .a sectional :elevation .taken generally on the line 19-19 ofFi'g. 15.;

Fig. 20 .is a sectional elevation taken generally .on the line 20-2 of Fig. 1.5, the lay being on .its forward stroke;

Fig. 21 is a longitudinal elevational section of .the right-.hand .shuttle .box unit, taken generally on .the line 2l-.21 .Of Fig. .1.0, the Shuttle being boxed;

Fig. 22 is a .fragmentary top .view of the inner end .portion ,of `the right-hand .shuttle box;

Fig. 23 .is .an elevation of a vportion of .the inner end of the right-hand shuttle ibox, `parts ,being shown in .section;

Fig. 24 is .an enlarged detail elevational section .of the discharge .end of a weft feedenshowing a feeding `feather of .the device inserted into Vthe shuttle;

Fig. .2-5 is Va longitudinal elevational section of `the outer end portion .of ythe .shuttle box;

Fig. 26 `is an enlarged fragmentary sectional YView of the discharge portion of a weft feeding guide, taken generally on the line 26-26 of Fig. 2l;

Fig. 27 is a detail side view of a shuttle-throwing `block;

Fig. 28 is a :fragmentary ,top View of the inner end portion of the ,left-hand shuttle box;

Fig. 29 is an enlarged fragmentary end View of the right-hand shuttle box,s-howing the weft-feeding feather yof .the feeding lever in the shuttle, yandrparts Vbeing shown .in section;

4ing brokenaway ,and parts being shown in section;

Fig. 32 .is a detail sectional View ytaken generally on thelineZ-SZ lof Fig. .10, .showing weft-clamping levers v.of the .rightfhand Shuttle Ebox in an intermediate position;

Fig. 33 .is Va .detail .view of the upper weft-clamping lever of the left-hand jshuttle box, parts being broken away;

Fig. 34'is a top View of a two-Way gripper shuttle;

Fig. 375 is atop viewofthe shuttle with weft-gripping members thereof removed, parts beingbroken away and partis being vshown in section;

Fig. 3,6 is .a longitudinal elevational section of .the shuttle, ,taken generally on theline .S6-36 of Fig. 34;

Fig. 37 is an elevationof the reed side of the shuttle; Fig. 38 is.an exploded view of the weft-gripping members;

Fig. 39 is aside-elevation of the central weft-gripping member;

Fig. 40 is a side elevation of one of .the outer weft- -srriiing' members;

lFig.` ilisan end view of'the shutt1eparts .of Va reed andfrightflrand `shuttle 'box V`vbeing .lshzoyvnin broken lines;

Fig. 42 is a transverse elevational section, taken generally on the line 42-42 of Fig. 34;

Fig. 43 is a transverse elevational section, taken generally on the line 43-43 of Fig. 34;

Fig. 44 is a transverse elevational section, taken generally on the line 44-44 of Fig. 34; and

Figs. 45 to 52 are schematic top views showing successive positions of the lay and associated parts during the cycle of operation.

In the drawings, the invention is shown to be embodied in a wire weaving loom which by way of example may be of the general type disclosed in Patent 1,790,335 to Weissenborn for Power Loom, issued January 27, 1931. The loom includes spaced side frame members between which are mounted a warp beam 11, a breast beam 12, and a cloth-receiving roll 13, all as usual. A swinging lay 14, here shown to be of the suspended type, is operated as hereinafter described to beat up weft wires a and 15b laid in the shed which is formed between the warp wires 16 by the alternate reciprocation of the heddles 17.

The lay 14 is retracted to its dwell by a pivotally connected piston rod 18 secured to a piston 19 working in an air cylinder 20, and is urged on its forward stroke by a coiled tension spring 21 connected at one end to the loom frame and at its other end to a lever 22 operatively connected to the lay by a link 23. The admission of air to the cylinder is both automatically and manually controlled as hereinafter described.

The lay 14 includes the usual horizontally extending lay beam 24 secured to the lower ends of side arms 25, and further includes the usual lay cap 26 between which and the lay beam is detachably secured the usual reed 27. The reed comprises parallel steel strips or dents 28 forming between them narrow spaces receiving therethrough the warp wires, the forward edges of the strips being disposed in a plane to form the face of the reed for beating up the weft Wires.

The weft-manipulating means of the present invention includes a ily shuttle 29 of the pirnless or gripper type which is thrown through the shed between shuttle boxes 30 adjustably mounted at the opposite end portions of the lay beam, the latter being provided with extension members 31. The reciprocatory gripper shuttle carries the weft wire through the shed in each direction from weft-supplying units designated generally by the numeral 32 and located at each side of the loom. The weft wires 15a and 15b, which are preferably, although not necessarily, identical, are fed from the right-hand and left-hand weft-supplying units.

The gripper shuttle 29, shown in detail in Figs. 34 to 44, comprises an elongated boat-shaped body 33 of nonmagnetic material, preferably metal, such as aluminum or stainless steel, the shuttle body being flat-bottomed and adapted to slide over the warp wires forming the bottom of the shed. In the loom illustrated, the bottom warp wires of the shed will adequately support the shuttle without the use of the conventional shuttle board or race member. The shuttle is suitably guided in a smooth true course along the reed, as by means of a channel-shaped permanent magnet 34 which is secured in the reed side of the shuttle body and exerts an attractive force on the magnetizable reed, there being a small air gap between the reed and the magnet. The permanent magnet is disposed in a longitudinal groove 35 formed in the shuttle body and has its ends clamped by cross bolts 36. The shuttle body is also provided near lts opposite ends with reed rollers 37 which are housed in wells 38 formed in the shuttle body and project slightly from the reed side of the shuttle body to ride on the reed face and determine the small air gap between the polar portions of the magnet and the edges of the magnetizable reed dents. Each reed roller has a ballbearing 39 carried on a headed pin 40 and has a resilient annular tread member 41, such as of rubber, which is attached to the outer race of the bearing by opposed shouldered clamping rings 42 riveted together. A spacing Washer 43 is interposed between the inner bearing race and the lower wall of the roller well.

The top wall of the shuttle body has formed therein a longitudinally extending recess or cavity 44 which terminates in notches 45 in the opposite ends of the shuttle body, the recess having a widened and deepened intermediate portion 46 and having aligned central end grooves 47. An elongated gripping bar 48 extends centrally in the recess 44 and has a thickened intermediate portion 49 which is clamped t0 the bottom of the intermediate portion 46 of the recess by screws 50. The opposite end portions 51 of the bar extend in the grooves 47 and are provided with terminal jaws 52 having lateral weft-gripping serrations or teeth 53, the teeth being formed on one side of one of the terminal jaws and on the other side of the other terminal jaw. Gripping bars 54 are disposed along opposite sides of the central gripping bar 48 at the opposite end portions of the latter bar and have widened inner end portions 55 which are clamped to the sides of the central bar by screws 56, the shuttle body being apertured to accommodate these screws. The reduced outwardly projecting end portions 57 of the two side bars 54 are laterally resilient and have terminal jaws 58 provided with serrations 59 cooperating with the respective serrations 53 at the opposite ends of the central bar to grip the end of a weft wire at either end of the shuttle. The gripping planes of the opposite serrated end portions of the central gripping bar are not aligned, but are laterally offset a small distance, for example, in the order of la", to facilitate feeding and release of the weft wires 15a and 15b, as hereinafter described. A pair of narrow channels 6'i) extend longitudinally in the top face of the shuttle along the opposite sides of the central gripping bar 48 to admit shiftable feeding and releasing parts, hereinafter described, for the respective weft wires 15a and 15b. Each channel 60 has an open leading end at an end notch 45 of the shuttle body, and has a trailing portion which is formed between the central gripping bar and an adjacent side bar 54 and extends to the relatively separable serrated end jaws 52 and 58 of these bars.

The opposed shuttle boxes 30 at the right-hand and left-hand ends of the lay are of generally similar construction and a description of one will serve for both. Each shuttle box comprises an elongated base or body 61 of light-weight cast metal, such as aluminum alloy. The shuttle box is longitudinally adjustable along the top of the lay beam 24 and its extension member and is suitably guided as by a pair of laterally spaced gibs 62 which are rigidly secured to the lay beam and engaged by an intervening flanged bar 63 secured to the bottom of the shuttle box, the latter having a longitudinal groove 64 to accommodate the gibs and the bar. The shuttle box is held in longitudinally adjusted position, as by stop blocks 65, Figs. 19 and 21, adjustably clamped to the lay beam. At its upper rear portion the shuttle box base has a longitudinal rabbet 66 the upper side of which is closed by an elongated metal plate 67 secured to the base as by screws 68, thus forming a channel 69 all or a part of which is closed along the rear by the face of the reed, the channel being open at the inner end of the base. The inner end portion of the channel is adapted to receive and guide the shuttle, as seen in Figs. 16, 20, and 21, the channel being slightly higher and wider than the shuttle. When the shuttle is housed in the shuttle box the rear side of the shuttle is comined by the face of the reed, and in some cases by a magnetizable plate '70, Fig. 10, which is carried by the lay and forms an extension of the reed face. With this arrangement the shuttle box may be adjusted along the lay beam so as to permit weaving of fabrics of diferent widths, it being unnecessary to change the length of the reed.

An elongated reciprocatory thrower block or picker block 71 is longitudinally sl'idble' in the shuttle box citati-nel: 69 te threw shuttle through the shed, as hereinafter described. The thrower block, hereinafter more'fully described, is suitably guided in its travel, as by blades 72 and 73 rigidly secured to the bottom of the' thrower block and slidable in` a guide groove 74 formed in the bottom wall of the rabbet 66. The outer end portion of the shuttle box hasV secured thereto a pair of adjacent blocks 75 and 76, the former of which closes the outer end of the channel 69. When the thrower block 71 is fully retracted, the distance between the forward end of the blockl and the inner or open end of the channel 69 is slightly longer than the shuttle, as seen in Fig'. 2l.

Opening at the bottom face of the shuttle-receiving portion ot' the rabbet 66 isI an elongated cavity 77 which houses therein a vertically' movable shuttle brake member 78 having a top friction lining 79 engageable with the bottom face of the shuttle, the end of the lining remotev from the entrancev of the channel 69 having a sloping stop portion 80, Fig. 21. The brake member is vertically4 guided at opposite ends by headed vertical screws 81 which are adjustably threaded into the shuttle box base and extend in shouldered bores 82 formed in the shuttle brake, thus adjustably limiting the upward displacement oft the brake member. The brake member is normally urged upwardly to its limit position by a pair of horizontal leaf springs 83 which extend through lat'- eral openings 84 in the shuttle box base and are intermediately fulcrumed on blocks 85, the inner ends of the springs engaging thebottom of the brake member at positioning pins 86, and the outer ends of the springs being urged downwardly by tensioning screws 87 threaded into the shuttle box base, Fig; 18. The brake member is provided with transverse openings 88 receiving brakereleasing parts hereinafter described.

Disposed longitudinally above the top plate 67v of the shuttle box is a generally' horizontal elongated weftfeeding lever or feeder arm 89 which is pivoted at its middle portion'on a horizontal pivot pin 90 mounted in a.' bracket 91 secured to the top plate, the arm being rockablein avertica'l plane through a small angle, and being movable'in a longitudinal guide slot 92 in the top plate. The feeder arm has a narrow longitudinally extendingverticalslot 93:V inwhich is secured a small diameter Ametal tube' 94 terminating near the opposite ends of the arm. Theweft wire sldably passes through this tubeand is gripped by the'shuttle and carried through the shed, as' hereinafter described. A lightweight tubular' pillar 95 is rigidly attached to the block 76 at the outer end of the shuttle box and mounts a transversely extending horizontal weft wire guide 96, Figs. l0, 1l, and 21, in alignment with the outer end of the wire-guiding tube 94 in the feederarm, the outer end 97 of the guide being funnel-shaped and the inner end being in the form of a channel 98 registering .with the adjacent end of the wire-guiding tube. The weft wire is conducted to the guide 96 from the associated weft-supplying unit 32.

The forward or inner end portion of the feeder arm 39v extends approximately to the inner end of the shuttle box and carries a thin feeding vane or feather 99 which projects longitudinally below the feeder arm in a vertical plane, the thicker upper portion ofthe vane being rigidly secured in the vertical slot 93 of the arm, as by screws 100. The forward end of the weft-guiding tube 94 in the feeder arm communicates with a narrow forwardly and downwardly inclined passage 101 formed longitudinally in the vane, the end of the weft wire extending throughV this passage, as seen in Fig. 24, which shows the vane in its depressedposition in the shuttle at the moment the shuttle is about to be thrown from the shuttle box; The feeder vane of -the right-hand feeder arm is insertible into'that one of theV two shuttle' channels 6i)J which is "nearer thereed face; while the vane of the leftihand feeder arm'is insertble 'into"theother shuttle eliannel. Dting the initial part f the shttle flight in either direction, the' vane opens' `theks'e'rrated jaws' 52,I 58 at the trailing end of the corresponding shuttle channel 6e, and the end of the weft'v wire protruding from the vane is caught or pinched in these jaws as'r they leave the vane, carrying the weft wire through the shed to the opposite 'shuttle box.

At a point near the feeding vane", each feeder arm has a transverse bushing 102 loosely receiving therein apin 103 secured to an end of an actuatingv lever 104,l hereinafter described, by which the feeder arm is rocked; t av point near its opposite end each feeder carries a pivoted latchl or pawl` 105 which is eleasably engageable with the upper end of a shoulder plug ,106 secured to the rear end of the thrower block 71. The thrower block, which is actuated as hereinafterv described, is retained in retracted position by this pawl,l as seenA in Fig'. 2'5 whenr the feeding vane 99 is in its upper position. When the feeding vane is lowered into' the boxed shuttle, as seenV in Figs. 2l and 24, the pawl i's released from the thrower block which is then projected on its shuttletlirowing stroke. in Fig. 2l, the thrower block is shown at the instant of its release, ready' to move on its forward stroke. l

At a point between the feeder arm pivot 90 andthe pawl 105, the feeder arm has a shouldered transverse boreV 107, Figs. 30 and 3l,V in which is seated a` weft'- clamping buttonV 198 and inv which is' slidablel a headed weft-clamping plunger 169, the; weft wire passing between the buttony and the plunger to be engaged thereby, and the weft-guiding tube 9d having a gap to accommodate the clamping parts.l The headed plunger 109 is'confined by anl apertured plate 110 through which the stem ofthe plunger slidably passes,` and: theplunger is urged against the weft wire by a light coiled springv 111 to impose a` light friction on the w'eft wire. A resilient cam blade 112 is carried by abracket 113 secured to the shuttle box cover plate 67 and is engage-able by the plungerV 169 when the pawl-carrying endy of the feeder arm 89 is inV depressed thrower-holding position', thus clamping the weft wire against movement. When the vane-carrying end of the feeder arm is depressed to feed the weft wire into the shuttle, the plunger is elevated to release the cam pressure", and the weft wire is then under a? slight' friction imposed by the coiled spring 111.

Each weft-supplying unit 32, Figs.' 3( to 5, includes a wire spool 114', preferably non-rotatable, which is'spaced youtwardly' from the wireV guide 96 and is detachably carriedlon a horizontal'rod 115, secured'toa verticalxnounting plate 116, the rod extending' in a direction generally parallel to" tneV lay and beingapproximately at the same elevation as the wirev guide 96. A stationary horizontal trackA bar'11'7 extends outwardly from the side of the loom vin parallel relation to the lay landina verticalfplane about midway of the stroke of the laybeam. The track bar is supported at its inner endby a vertical plate 118 adjustably clamped to the side frame member 10of the loom, and the outer end-of the` bar is carried on avertical rod 119 adjustably clamped to a: standard or A-frlame 1220.v A carriage 121 is movable' alongthetraclc bar and has guide rollers 122 riding inl top` and' bottom grooves 123 formed longitudinally in the track bar. 1 A'top block 1221011 the carriage'has a vertical pin 12S on which is swivelied a horizontal lplate "126 having a transverse hinge connection 127 with the lower end ofthe spool mounting plate 116. The upper end o'f'the'spool'mounting plate is rigidly secured to an end of agener'ally horizontal tubular connecting bar or strut 128 of light-weight metal, the other end of the bar having' a ball-'and-socket connection 17.9' with the upper'end of the: pillar 95 on the shuttle box. The connecting bar 128 carries thereon a plurality or spaced coaxial guide rings" orl loops 130 through which the weft wireextends from the spool 114 tothe shuttle box'wire guide 96,' the' rings beingprogressively smaller toward the Tshuttle box" and beingcoaxial with the spool-supporting rod 115. With the arrangement above described, the weft wire is drawn oi the stationary spool to the feeder arm S9 on the shuttle box, and during the swing of the lay the spool support swivels on the carriage 121, which rolls back and forth a short distance on the track bar. When the shuttle box is adjusted inwardly and outwardly along the lay beam, the spool-supporting carriage moves with the shuttle box and rides on the track bar.

At its shuttle-receiving end portion the shuttle box body has spaced forwardly projecting vertical anges 131 and 132 through which extend horizontal upper and lower shafts or rods 133 and 134 disposed in parallel relation to the lay beam, the shafts being secured to the iiange 131 by a vertical locking pin 135. A brake-releasing member 136 has a tubular hub portion rotatably carried on the lower shaft 134 between the anges 131 and 132 to rock on this shaft, and has rearwardly projecting arms 137 and 138 which extend through openings 139 in the shuttle box body, the arms having rounded ends fitting in the openings 88 of the brake shoe 78 for depressing the shoe to brake-releasing position against the action of the brake-applying springs S3. The brake-releasing member carries a downwardly projecting arm 140, Fig. 17, which is adapted to engage a resilient stationary stop 141, Figs. 3, 6, and 9, at the end of the backward stroke of the lay for releasing the shuttle brake at this point of the cycle of operation. The arm 137 carries an upstanding rib 142, Fig. 19, which is adapted to be depressed by other actuating means, hereinafter described, for holding the brake released at certain other times in the cycleof operation.

The actuating lever 104 for the feeder arm is rockably carried on the upper shaft 133 adjacent to the body ange 131 and has a forked arm 143 pivotally connected to a push rod 144 which extends downwardly through a tubular part 145 formed on the shuttle box body, as seen in Fig. 16. The lower end of the push rod has a head 146 slidably guided in the lower end of the tubular part 145 and normally urged downwardly by a coiled spring 147 within the tubular part. The push rod head 146 carries a roller 148 which is cam-actuated as hereinafter described. The lever 164 also carries an abutment screw 149 engageable with the top edge of the rib 142 of the brake-releasing arm 137 for holding the armed brake-releasing member 136 in brake-releasing position.

Upper and lower weft-clamping levers 150 and 151, Figs. 15, 32, and 33, are pivotally carried on the ends of the shafts 133 and 134 and are axially conned thereon by a retaining plate 152 secured to the shafts by screws 153. These levers project rearwardly from the shafts and have their free end portions above and below the path of the weft wires and adjacent to the inner end of the shuttle box. The hub portions of the levers 151) and 151 have meshing gear segments 154 for causing simultaneous movement of the levers with a scissors-like action. The levers are swingaole apart to permit passage of the shuttle, and the downward movement of the lever 151 is limited by an adjustable eccentric stop 155 secured to the shuttle box body. An arm 156 has its upper end pivotally connected to the lower lever 151 by a pin 157 and has its lower end secured to a slide block 15S as by a screw 159. A horizontally elongated guide member 160 is secured to the bottom of the lay beam 24 along and in front of a bottom iiange 161 of the lay beam. The guide member has spaced downwardly projecting longitudinal flanges 162 and 163 forming between them a downwardly opening slot 164 in which the slide block 156 is vertically slidable. A follower lever 16S has a forked upper end 166 pivotaliy secured by a pin 167 to the lower end of the arm 156, and carries at its lower end a roller 168 which is cam-actuated as hereinyafter described. The follower lever165 is urged rearwardly against the lower end of the arm 156 by a leaf spring 169 so as to resist relative displacement of these parts during the forward swing of the lay, and the follower lever is swingable about the pin 167 against the yielding action of the spring 169 during the rearward swing of the lay, so as to prevent upward displacement of the arm 156 during this part of the cycle. In Fig. 15, which shows the relation of the parts during the forward swing of the lay, the arm 156 has been displaced upwardly to close the clamping levers and is retained in 4this position by an elongated latch bar 170 of L-shaped cross-section having a vertical flange 171 and a for- E projecting horizontal flange 172. The vertical flange 171 is disposed in a slot 173 formed between the downwardly projecting lay beam flange 161 and the downwardly projecting guide member flange 162, and the upper edge of the vertical latch bar ange has a longitudinal bead 174 which fulcrums in a groove 175 formed along the upper portion of the flange 162. One or more coiled springs 176 are interposed between the lay beam franges 161 and the latch bar flange 171 and urge the latch bar forwardly. The horizontal latch bar flange 172 has a forward edge 17'7 which retains the latch bar in lits upper position, and which is beveled to permit upward displacement of the latch bar. The lever actuating arm 156 is laterally confined between the end face of the Shuttle box body and a guide member 178 secured to the body, and the arm is urged downwardly by a coiled spring 179. The latch bar is released at the end of the forward stroke of the lay by striking a resilient stop formed by an axially adjustable springpressed plunger 130 carried on a bracket 181.

'he upper weft clamping lever 150 carries an abutment screw 182 which in the lower position is engageable with the upper edge of the lib 142 on the brakereleasing member 136 to hold the shuttle brake in released position. The upper and lower weft clamping levers have respective serrated clamping jaws 183 and 134 which are adapted to clamp the weft wire between them. The clamping jaw 133 of the upper lever is carried at the free end of a leaf spring 185 which is adjustably tensioned by a screw 186. The upper weft clamping lever carries a knife 187 adapted to cooperate the lower lever jaw 184 to sever the outgoing weft wire after the weft is laid in the shed. Although the knives at the opposite shuttle boxes are depressed simultaneously, he knives are notched, as seen in Figs. 32 and 33, or otherwise offset, so as to clear the leading ends of the laterally offset weft wires 15:1 and 15b. Each upper weft clamping lever 156 carries a downwardly projecting cam tongue 183 laterally engageable with the lower lever to insure good cutting action. Each upper weft-clamping lever also carries a hook member 189 the purpose of which is hereinafter described.

A weft-releasing lever 190, Figs. 20 to 23, extends along a side of the feeding end portion of the feeder arm 89 and is rockably mounted on a pin 191 secured to a bracket 192 on the shuttle box cover plate 67 to swing in a vertical plane. The weft-releasing lever 190, which is laterally confined between the feeder arm and the bracket 192 and has an arched portion 193 to clear the actuating lever 104 for the feeder arm, is urged upwardly by a compressed coiled spring 194, Fig. 23, pocketed in the feeder arm, the upward travel of the lever being limited, as seen in Fig. 21, by a rear extension 195 engageable with the feeder arm. The weft-releasing lever carries a downwardly projecting cam blade 196, Figs. 20 and 29, which is movable in a side notch 197 formed in the feeder arm and is adapted to enter in the shuttle channel 69 at a point between the fixed gripper bar 48 and the resilient gripper bar 54 so as to spread the gripper jaws 52 and 53 and thus release the gripped end of the weft wire from these jaws after the Shuttle is boxed. The free end of the weft-releasing lever extends under the hook member 189 of the weft-clamping lever 150 so that when the latter lever is depressed the weftreleasing lever will be moved downwardly by the hook member, as seen in Fig. 20, to spread the weft-gripping jaws of the shuttle.

A light-weight wheel or roller 198, Figs. l0, 18, and 19, is rotatable on a shouldered vertical shaft' 199 secured in the shuttle box body and extends through a'Y lateral opening 200 in the shuttle-receiving portion' ofthe body for rolling contact with the front side of theV shuttle, the roller having a rim 201 of rubber or other suitable material to engage the shuttle. The lower portion of the shaft is rotatively adjustable in abore 202 formed in the shuttle box body and isv locked therein as by a setscrew 203. The upper portion of the shaft, which carries the roller, is slightly eccentric to the lower prtion so that rotative adjustment of the shaft will provide the desired frictional contact between the roller and the shuttle. The roller extends between the shafts 133 and 134, the latter shaft and the brake-releasing member 136 thereon being cut away to clear the roller. The roller has an upwardly projecting hub 204, Fig. 18, to which is adjustably secured an arm 205 having an opstanding pin 206. A coiled 4spring 207, which extends longitudinally of the shuttle box, has one end secured to the pin 206 and has its other end secured to the shuttle box body, as seen in Fig. 10. At itsrunderside the roller carries a cam member 208 which isengageable with the plunger 209 of a push-button switch 210 mounted on the shuttle box body, the switchbeing adapted to control the lay operation, as hereinafter set forth. The switch 210 is normally in one position, such as an open position, and is actuated by the roller cam 208 to the other position when the shuttle is properly boxed, as hereinafter described. The diameter of thev wheel or roller 193 is so .selected that the weft-carrying shuttle entering the shuttle box will turn the roller through an angle of about 210 before the shuttle is' stopped by the shuttle brake. Of this displacement of the roller.' the first' 180 is against the action of the spring 207 and provides a shuttle-braking action, andthe next 30 of angular travel is assisted by the spring so that` the roller then has a tendency to drive the shuttlev farther into the shuttle box. A small additional spring-urgedV travel of the shuttle will thus occur upon release ofi theV shuttle brake,l so as to stretch olf the laid weft wire which is still gripped by the shuttle and is clamped atV theV opposite shuttle box by the parts 108, 109, 112', Figs. 30 and 3l. Uponl subsequent release of they weft wire from the' shuttle by the jaw-spreading cam blade 1.96, ,the springurged roller will drive the shuttle still farther in a homing travel against the adjacent end of the` throwerv block or ram 71 and hold the shuttle firmly against this block i-n.- preparation for the .succeedingV throwing operation, thus preventing impact between the thrower'block and. the shuttle.

rthe shuttle-throwing block 71 is. formedof a-suitable light-weight shock-resistant material such as a laminated plastic, for example, Formica,` the blockv being transversely perforated to reduceweight. A longitudinal bore 211 is formed in the thrower block toreceive a` stop rod 212 having a front head 213. A headed hollow bolt 214, Figs. l2 and 25, which extends in the rear end of the thrower block, is threaded into the shoulder plug 106 and clamps an L-shaped metal cable-anchoring. member 215. The stop rod 212 extends slidably through'the bolt 214 and the shuttle box end block 75 and has adisk-like rear head 216 in the adjacent shuttle box block 76; A compressed coiled springl 217 is interposed between the block 76 and the rod head 216 and serves to cushion the thrower block at the end of its forward travel. The thrower block is spring retracted as by a exible wire 218 secured to the block and passing around a spring-rotated retriever drum 219 which is mounted on a bracket 220, Fig. 11, secured to the rear end of the shuttl'ebox body.

The thrower block 71 is urged on its shuttle-impelling stroke by pneumatic mechanism including a cylinder casing 221 which is rigidly securedtowtheshutt-le box'b'ody and has a lateral chamber-formingf'extension 22.` The cylindery casing has abo're- 223 therethroughy which is closed at opposite ends-by heads 224 and 225, the latt'er having a coaxial cylinderV sleeve 226 projecting into the bore, and'l there being anair chamber 227 in the casing communicating with the frontend of the cylinder. A pistorrV 22S is slidable in the cylinder and has a hollow piston rod 229` projecting through thev cylinder head 224. Thek outer end" of the piston rodis provided with a yoke 230'? having a cross pin 231i which rotatably carriesthree grooved ball-bearing sheaves or pulleys 232. A vertical boss 233 on the shuttle box body carries an upstanding stud 234 on which are rotatably carried two grooved ball-bearing sheaves or pulleys 235 and a similar sheave or pulley 236 of' larger diameter, the latter' pulley being lowermost` andv extending into a slot 237 formed in the shuttle box body at the side-of the' rabbet 66. A ilexible cable 238 is trained over the pulleys 232', 235, and 236 to formV a motion-multiplyingl pulley block, one end of the cableubeing anchored on aclip 239 secured to the shuttle box, and the other end being secured to theV rear end member 215 of the thrower block. The cable extends forwardly from the thrower end'member 215 along a side of the thrower block? and then passes around the large diameter pulley 236 and to and around the lowermost pulley 232 on the piston rod yoke. The cable then passes back and forth around the other pulleys and thence forwardly to the anchor clip 239. With this arrangement, the end of the cable attached' to theA thrower block will have a speed several times greater than the speed of the piston. The several pulleys are of light-weight construction and inertiaeifects are relatively low. The pulleys and the piston rodare preferably maderof a light metal, such as an aluminum alloy.

The cylinder'head 225 has' an air inlet 240 periodically supplied with air under pressurefthrough apipe 241 which extends along thershuttle box and isconnected by a ilexibley tubel 242 tov aA stationary three-way air valve 243, Figs. 3 and 6, providedrwith a compressed air intake 244 and an exhaust 245. The air valves 243 for the respective shuttle` boxes are mounted on the side frame members of the loom and are actuated by cams 46 on the opposite ends of a continuously rotating cam shaft 47 which extends across the loom and is journalled in bearing pedestals 428. The cam shaft is driven at a suitable speed from the loom drive as by means' including a chain sprocket 249 on the shaft, the shaft being rotatable through one revolution for each complete loom cycle during which each of the weft wires 15a and 15b is laid in the shed from the opposite sides ofthe loom. The two sides of each air cylinder are in communication through a spring-loaded check valve 250, Fig. l2, which permits air to flow from the head 225 to the air chamber 27 but prevents flow in the opposite direction. The cylinder head 225 is provided with a plurality of exhaust ports or vents 251 which are normally open to atmosphere. The inner ends of the ports are closable by a disk valve 252 carried on acentral valve stem 253 which is slidable in the head coaxially of the cylinder, the disk valve seating against a seat-forming rubber ring 254 carried by the head. A spring' 255 normally urges. the disk valve inwardly to its open position, and the valve carries a resilient buffer 256 engageable by the piston at the end of its throwing stroke to close the disk valve. The cylinder casing is charged with air when the disk valve is closed, compressed air then passing into the cylinder at one side of the piston and any needed leakage-replenishing air passing through the check valve 250 to the chamber 227 which communicates with the other side of the piston. During this operation,tlie air pressure holds the disk valve closed, and the difference in total pressure on opposite sides of the piston incident to the area of the piston rod moves the piston forwardly. Simultaneouslythe retriever drum 219 retracts the thrower block 71 and maintains tension on the cable 238, the thrower block being finally latched in its retracted position by'the pawl 1055o'n1 the feeder arm. At this time the three-way valve 243 exhausts the pressure in the head end of the cylinder to a low value, whereupon the spring 255 urges the disk valve 252 inwardly to its open position. The piston is then under considerable pressure ready to effect throwing of the shuttle upon release of the pawl 105 from the thrower block. The air pressure on the piston tensions the relatively long flexible cable 23S and thus stores a considerable amount of energy in the cable. When the pawl is released the piston moves quickly on its shuttle-throwing stroke, the cylinder head ports 251 permitting rapid venting of the cylinder. As the volume of the air chamber or reservoir 227 is several times as large as the piston displacement, the air pressure in this chamber remains approximately constant during the travel of the piston so that the force on the piston is approximately constant during the throwing stroke of the piston.

A horizontal cam mounting frame 257 is placed at each side of the loom below the lay and is movably supported on a rail 258 secured along the breast beam 12 and on a horizontal rod 259 projecting inwardly from the adjacent side frame, so as to permit lateral adjustment of the frame. Each mounting frame carries thereon a stationary cam 260 and a laterally adjacent vertically swingable cam 261.

As seen in Fig. 8, the stationary cam 260, which has a rounded cam surface 262, is pivotaliy secured at its rear end to a bracket 263 adjustably secured to the frame, and is urged upwardly by a coiled spring 264 against an adjustable step screw 265, so as to permit downward yielding of the cam. T he cam roller 16S for the weft-clamping and cut-off mechanism rides on the stationary cam 266 when the lay is at the rear portion of its swinging travel. However, because of the spring-urged follower lever 165 on which the roller 16S is carried, the weft-clamping and cut-off mechanism is operated only during the forward swing of the lay. The spring mounting of the stationary cam 260 permits yielding of this cam under abnormal pressure.

The swingable cam 261, Fig. 7, is in the form of an elongated inverted channel which is saddled over the rear end portion of a swingable arm 266, the arm being pivotally mounted at its .front end on a bracket 267 adjustably secured to the mounting frame. The cam 261 is urged upwardly by coiled springs 26S against adjustable stop screws 262 so as to permit downward yielding of the cam under excessive pressure. The front end portion of the cam 261 has a nose or hump 270, and the rear end has a drop-off point 271 and a depressed rearwardly rising cam surface 272 formed on a hardened block 273. The roller 14S for the weft feeding mechanism rides on the swingable cam 261 during certain parts of the cycle of operation, as hereinafter described. A rock shaft 274A is journalled in the rear portion of the mounting frame 257 and carries an arm 275 with a forked end engageable with a pin 276 on the swingable arm 266 to actuate the latter arm. A second arm 277 on the rock shaft 274 is connected by a depending rod 278 which has a yoke 279 at its lower end provided with a roller 2% riding on a cam 251 on the cam shaft 247, the yoke being slidably saddled over the cam shaft. The cams 231, which are near opposite ends of the cam shaft, are arranged to actuate in alternation the swingable cams 261 for the weft feeding mechanisms at the opposite shuttle boxes. Each cani mounting frame 257 carries near its front end the resilient latch releasing stop 180, 181, Figs. 6, 9, and 15, and carries near its rear end the resilient shuttle brake releasing stop 141, Figs. 3, 6, and 9. The rearward swing of the lay is adjustably limited by back stop screws 282 carried on the side frames of the loom.

The shuttle box switches 210 may be either normally open or normally closed, depending on the type of laycontrolling circuit to be used, and are here indicated to be normally open and to be closed by the arrival of the shuttle for permitting the subsequent fall of the lay. The

lay-retracting air cylinder 20 has a valve 283 which in one position admits compressed air to the cylinder to retract the lay and in another position effects exhaust from the cylinder to permit the fall of the lay. The valve is operated to one of these positions, such as the latter position, by an electromagnet 284 connected to supply means 285, the supply circuit including contacts of a relay 286. The relay winding forms part of a circuit including a low voltage battery 287 or other source of current. The two shuttle box switches 210 are connected in parallel, and the parallel combination is connected in series in this circuit. rEhe circuit also includes other series-connected switches, such as manually operable lay-carried switches 288 and 239 which are normally closed, another normally closed manually operated switch 290, and a cyclically operated timer switch 291 which automatically controls the loom operation. The shuttle box switches or circuit, closers 210 also have connected in parallel therewith a switch 292 which is mounted on the loom frame, Fig. l, and is actuated to open position by a projection 293 on the lay as the lay approaches the back stop, this switch at other times being in closed position. When any of the seriesconnected switches are opened the lay will be retracted to its dwell. With the arrangement above described, a failure of electrical power will cause the lay to oe retracted.

When it is desired to employ the type of lay-controlling circuit shown in the above Patent 1,790,335 to Weissenborn, the shuttle box switches are arranged to be normally closed and to be opened upon the arrival of thc shuttle in the shuttle box.

In setting up the loom for use, the shuttle boxes are shifted along the lay beam and reed to suit the width of cloth to be woven, the inner ends of the shuttle boxes being close to the cloth edges, so as to minimize waste of weft wire. In this adjustment the weft-supply carriages 121 roll along the track bars 117. rThis adjustment also permits the use of reeds of various lengths, for example, reeds which have been shortened because of damaged end portions. The cam mounting frames 257 are shifted along their supporting members so as to register the cams 260 and 261 with the cooperating rollers 168 and 14S. However, the latter adjustment is not critical as the cams are considerably wider than the rollers. As the shuttlethrowing mechanisms are carried by and shiftable with the shuttle boxes, these mechanisms require no separate adjustment. However, if adjustment of throwing force is desired, as for different cloth widths and different weft wire sizes, the air pressure may be changed.

1n the operation of the loom, starting with the shuttle 29 in the right-hand shuttle box, and the lay just starting to swing back, the sequence of events is as follows: As the roller 14S of the right-hand weft-feeding mechanism rides onto the associated cam 261, which has been elevated by the cam shaft 247, the lever 104 is rocked by the push rod 144, depressing the feeding end of the feeder arm 89 to insert the weft-feeding feather or vane 99 in the adjacent end portion of the corresponding shuttle channel or passageway 6i), and at the same time depressing the brake shoe 78 by the engagement of the abutment screw 149 with the rib 142 on the brake-releasing arm 137. This passing position of the lay is represented schematically in Fig. 5l. The angular displacement of the feeder arm also releases the cam pressure on the right-hand weftclamping plunger 109, and when the feeding vane reaches its lowermost position the pawl at the other end of the feeder arm is released upwardly from the shoulder plug 106 of the thrower block, causing the thrower block to throw the shuttle under the urge of the tensioned cable 238 and of the piston 228 in the air cylinder The energy stored in the tensioned low-inertia cable imparts a high velocity to the shuttle at the instant the latch or pawl is released. As the shuttle travels to the left from the righthand shuttle box, the weft-clamping jaws at the trailing end of the shuttle grip the end of the weft wire 15a protruding from the feeding vane as the vane passes between 13 these jaws, and the shuttle continues through the shed to the left-hand shuttle box, as indicated in Fig. 2, carrying the weft wire which is then ander a slight friction at the spring-pressed plunger 1619Y of the right-hand shuttle box. Upon entering the left-hand shuttle box, the shuttle cocks the spring-tensioned roller 198. At the end of the shuttlethrowing stroke of the piston in the right-hand throwing cylinder, the piston closes the ventA valve 252 against the action of its spring 255, and the three-way valve 243 then operates to admit `compressed air to the cylinder for returning the piston, the vent valve remaining closed by the pressure of this air during the return stroke of the piston.

Under normal conditions the shuttle arrives at the lefthand shuttle box before the lay reaches the back stop. After the shuttle enters the left-hand shuttle box and as the lay approaches the back stop, the cam roller 148 at the right-hand shuttle box drops off the point 271 of the elevated cam 261 and onto the cam surface 272, thus rocking the right-hand feeder arm in the other direction to lift the feeding vane and to increase the clamping pressure on the weft wire at the plunger 169 before stretch-olf occurs. As it approaches the back stop, the lay also opens the switch 292 which is connected in parallel with the shuttle box switches 210,

Just before the lay reaches the back stop, the arm 140 of each brake-releasing member 136 strikes the resilient stop 141, thus depressing the brake shoe in each shuttle box and releasing the shuttle which is then in the left-hand shuttle box. This permits the spring-tensioned roller 198 for the left-hand shuttle box to drive the shuttle farther into this shuttle box so as to stretch olf the laid weft wire.

At this point, under normal conditions, the timer switch 291 is closed and the lay is ready to fall. However, to permit the fall or advance of the lay, the cam 208 on the spring-tensioned indicator-forming wheel or roller 198 must be in such position as to'close the switch 210 in order that the lay cylinder valve 283 may be actuated to its exhaust portion. If the weft wire should be broken at the time of stretch-Dif, or if the weft wire should be absent, the shuttle will be carried by the roller 1915 beyond the stretch-olf', position and against the left-hand thrower block. This additional shuttle-travel is suificient to cause the roller cam 295 to pass beyond the switch plunger 209 and thus cause this switch to open. Under this condition the` lay will not fall, as the lay cylinder valve will `not be actuated to exhaust position. Should the shuttle be improperly located at the time the lay isV against the back stop, the roller ca m will be out of switch-actuating position. v

With all functions normal, the lay begins to fall, whereupon the arm 140 of the shuttle brake release member leaves the resilient stop 141, permitting both brake shoes 78 to be raised by their springs 83. At the same time the rollers 168 of both of the wire holding and cutting off mechanisms ride on and over the stationary cams 260, causing the levers 150 and 151 to close and hold the weft wire 15a and then cut off thisl weft wire at the right-hand shuttle box. As these holding levers close, they are retained in closed position by the spring-pressed latch bar 170, as seen in Fig. 15, illustrating a more forward position o f the falling lay. The stretched and cut-olf weft wire is thus held or clamped at both ends until the time of beat. The closing of the weft holding levers also depresses the brake-releasing arms 137 by the abutment screws 182 on these levers, and forces the cam` blade or prong 196 downwardly between the weft-gripping bars of the shuttle to release the gripped end of the weft wire, thus permitting the shuttle to be carried to the left-hand thrower block by the spring-tensioned roller 19S. This final travel of the shuttle opens the shuttle box switch 210, but the parallel-connected switch 292 has previously been closed by the initial forward travel of the lay so as to avoid premature retraction of the lay. As the advancing lay approaches the beat line, Fig. 49, the latch bars 170 for the wire holding mechanisms strike the resilient stops 180, causing the weft- 154 holding levers to'open approximately at the time of beat and simultaneously lifting the lef-releasing cam blade 196 from the shuttle.

At this point the timer switch 291 opens and the lay swings back to start the second phase of the cycle, with the shuttle in the left-hand shuttle box, the left-hand swingable cam 261 being raised to operating position and the right-hand swingable cam being lowered. The sequence of operations. is then repeated, with the operations applying to the reverse sidesfor manipulating the weft wire 15b supplied from the left-hand side of the loom. In Fig. 45, the shuttle has arrived at the right-hand shuttle box with the weft wire 15b, and thelay is at the back stop. In Fig. 46, the lay is still at the back stop, and stretch-off has occurred. In Fig. 47, the lay has started to fall, and the weft wire has been clamped an-d cut off. In Fig. 48, the lay is still falling and the shuttle has been released from the weft wire and has advanced to the thrower block. In Fig. 49, the lay is still falling and is approaching the beat line. In Fig. 50, the lay is shown at the time of beat-up. Figs. 5-1 and 52 show the lay on its retracting stroke and at the end of its retracting stroke, as hereinbefore described.

The charging of the airV cylinders of the shuttle-throwing mechanisms lmay continue over the greater part of the cycle ofoperation, as the throwing operation is very brief.

While the invention has been embodied in a loom of the reciprocating shuttle type, some features of the invention are also applicable to the general type of loom in which a shuttle passesthrough the shed in one direction and returns-inra path outside the shed.

WhatI claim as new and desire to secure by Letters Patent is:

l. In a loom, a weft-inserting gripper shuttle, a shuttle box adapted to receive the shuttle, a releasable shuttlebraking means, and impelling means for continuing the terminal travel of the shuttle after braking of the shuttle.

2. In Va loom, a weft-inserting gripper shuttle, a shuttle box adapted to receive the shuttle, releasable shuttle-braking means, and a movably mounted shuttle-impelling member at said shuttle box frictionally and releasably coupled withV said shuttle for continuing the terminal travel of said shuttle after braking of the shuttle.

3. In a loom having a lay, a weft-inserting gripper shuttle, a shuttle boxadapted to receive the shuttle, releasable shuttle-braking means, a movably mounted shuttle-impelling member at said shuttle box releasably coupled with said shuttle for continuing the terminal travel of said shuttle after the braking operation, and means for controlling the advance of the lay including a control element actuated by said movably mounted member.

4. In a loom having opposed shuttle boxes and shuttlethrowing means including shuttle-projecting members, a reciprocatory weft-inserting shuttle adapted to engage a weft element, releasable shuttle-braking means at each shuttle box, releasable weft-clamping means at each shuttle box, weft-severing means at each shuttle box, and impelling means at each shuttle box for continuing the terminal movement of thev shuttle after braking of the shuttle to effect stretch-off ofthe weft element and to bring and hold said shuttle against the associated' shuttle-projecting member.

5. In a loom, the combination of a swingable lay having a reedadapted to guide a shuttle, and a shuttie box secured to said lay and longitudinally adjustable along said lay and reed, said shuttle box and reed forming opposite sidewalls of a shuttle-receiving space.

6. In a loom, the combination of a swingable lay having a reed, a shuttle box secured to said lay and longitudinally adjustable along said reed, and a shuttle-throv-J- ing power unit secured to said shuttle box and bodily shiftable therewith.

7. In a loom, a swingable lay, a shuttle box secured to said lay and adjustable alongsaid lay, a weft-inserting shuttle, and? throwing means for said shuttle including 

